In any case, this clip where he restores a rusted deba seemed packed full with all manner of info I've been gleaning from folks on this forum, only here it is given visually;
Beginning with rust-removal by sanding (and the tools he used), and ending with a high-mirror finish (with low contrast).
Just thought I'd post here

Yesterday I got my hands on a tiny little Takashima tomae, and happily brought my own Tanaka Deba to a similar mirror finish. Bliss.
Now to figure out how to get some more contrast there. Perhaps just a wee-bit of patina

Haha. I admit I watched it. But the millions of hits are clearly from his other videos. Making knives from cardboard, pasta, carbon fiber, and all in a tiny Japanese apartment...this guys has created a following the hard way! Good for him.

~Joe

Comments: I'm short, a home cook, prefer lighter, thinner blades, and own mostly Konosukes but have used over a dozen brands.